Tap...
Berkah placed his palm on the surface of the water, or rather, the layer that covered it, to investigate.
At first he could not sense anything, it was as if the waters beneath his feet were covered by some sort of thin layer, like plastic.
[It's more than just plastic, something much more durable despite its high malleability.]
[...]
Berkah continued focusing intently, spreading his own Mana and Mana Dome throughout the surface of the water.
A few more minutes elapsed and he still could not sense anything, all that registered in his senses was water and nothing more.
But it was clearly much deeper than that, so Berkah stubbornly continued surveying the layer that was undetectable even by his Mana Dome.
[If I can just figure out what it is then maybe...]
Berkah pushed forward despite his mental strength waning and the urge to give up tugging at his being.